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"Over the past two years, we have worked together to achieve significant accomplishments, including substantial investments in K-12 and higher education ... and life-changing work in some of Virginia's most challenged school divisions," Virginia Gov. Terry McAuliffe said of Holton in a statement.

Kaine was governor from 2006 to 2010, making her the second daughter of a Virginia governor to become the state's first lady, following Martha Jefferson Randolph. She was the first first lady to live in the executive mansion both as a child and as a first lady.

Holton was a judge on the Juvenile and Domestic Relations District Court in Richmond and served as chief judge for three years. In 2007, she launched "For Keeps: Families for all Virginia Teens" as first lady, an initiative for children in foster care.

She and Kaine met at Harvard Law School; they both earned their degrees in 1983 and were married in 1984. The couple has three children, Nat, who is a Marine, Woody and Annella.